(a) The table below shows the payoff matrix in terms of profit for two stalls, A and B, with two pricing strategies, high price and low price.

	Stall B
High Price	Low Price
Stall A	High Price	$20m for Stall A $8.5m for Stall B	$30m for Stall A $6.5m for Stall B
Low Price	$7.5m for Stall A $50m for Stall B	$25m for Stall A $40m for Stall B

Solve for the Nash equilibrium and explain whether this game is a prisoner's dilemma game.

(b) If the game becomes a sequential game where Stall A gets to move first, construct a decision tree diagram and solve the game using roll-back method. Explain your answers.